基于ANSYS的表面声波标签仿真研究

声表面波无线射频识别技术是现代无线射频识别方法之一。针对目前声表面波标签设计复杂，精度要求较高等特点，提出了基于ANSYS的声表面波标签设计方法。在声场波动方程和Maxwell方程的基础上，研究二维模型的可行性，采用128。YX-LiNb0，压电晶体为基底，金属铝为叉指换能器电极，设计2个叉指换能器周期的声表面波标签模型。对声表面波标签进行模态分析和谐响应分析，仿真结果反映了声表面波在压电基底上的传播轨迹，声表面波的能量分布图以及幅频特性，为声表面波标签的精确设计提供依据

SAW Tag Modeling and Simulation Based on ANSYS

The radio frequency identification technology based on surface acoustic wave is one of the modern RFIDmethods. For the complex design and high precision of the SAW-Tag,the paper proposed a design method based on theANSYS. On the basis of the acoustic wave equations and Maxwell equations, the feasibility of two-dimensional modelwas deduced. The piezoelectric crystal 1280 YX-LiNb03 was set as the base and the aluminum as the electrode ofinterdigital transducers. the SAW tag model by two interdigital transducers was created. Through modal analysis andharmonic analysis of SAW tag, the propagation of SAW in piezoelectric substrate can be presented. as well as the energydistribution and the amplitude frequency characteristics. which provide the proof for precise design of SAW tags.